[Game Driver] Add support for whitelist.

Instead of keeping reading the whitelist everytime, we want to store it in
Settings.Global variable and reuse it later.

BUG: 120869311
Test: Build, flash and boot.
Change-Id: I5e39757383c5ba7d31af7efb3e6e8a2996e669f4
Merged-In: I5e39757383c5ba7d31af7efb3e6e8a2996e669f4
4 files changed